Moderate to large tree, often buttressed, unarmed or armed with recurved prickles on stems and rachises; branchlets becoming glabrous in age. Leaves bipinnate with 6-8 pairs of pinnae; petioles ca 4-5 cm long, glandular near the base; leaflets many (ca 30 pairs per pinna), oblong to subfalcate, apiculate at apex, truncate at base, 8-12 mm long, ca 2 mm wide, puberulent, the underside paler; midvein submarginal. Flowers cream or white, fragrant, in terminal panicles, the heads small, dense, globose, to 12 mm diam, bearing 12-20 flowers; calyx ca 1 mm long, strigillose; corolla ca 2 mm long, deeply 5-lobed; stamens numerous, showy, white, to 7 mm long. Legumes narrowly oblong, flattened, 10-20 cm long, ca 3 cm wide, becoming glabrous; seeds few. Aviles 10b. Collected once; not seen in recent years. Flowers mostly from September to January, especially from September to November. The fruits mature mostly from January to May.